Synonyms for Rudderfish (same or very similar meaning)
WordNet sense 1 (food and game fish around Bermuda and Florida; often follow ships):
Bermuda chub, Kyphosus sectatrixWordNet sense 2 (fish having the habit of following ships; found in North American and South American coastal waters):
banded rudderfish, Seriola zonataFrom the ODE community, based on WordNetadd/edit